我正在使用 Qt5.5 在小型嵌入式 Linux 设备上开发应用程序。我需要能够在我的应用程序中修改从 Linux ( tslib ) 接收的鼠标按下坐标。我尝试在我的主视图中实现一个事件过滤器,它修改接收到的鼠标坐标,创建一个新的鼠标事件并将新事件提交给小部件。但是,在小部件的 mousePressEvent 函数中,我只看到一次调试消息,它是接收到的原始坐标,而不是我截取和修改的坐标。
目前,当我触摸屏幕时,我会收到调试消息,它们看起来像这样:
Mouse Original: QPoint(192,148)
Mouse New: QPoint(128,148)
Mouse Original: QPoint(192,148)
Mouse New: QPoint(128,148)
Mouse Original: QPoint(192,148)
Mouse New: QPoint(128,148)
Mouse Original: QPoint(192,148)
Mouse New: QPoint(128,148)
Mouse Original: QPoint(192,148)
Mouse New: QPoint(128,148)
Mouse Original: QPoint(192,148)
Mouse New: QPoint(128,148)
Mouse Press 192 148
如何在顶层拦截鼠标事件,修改它们的坐标,并将它们发布到我的小部件,同时还消耗原始的鼠标事件?谢谢!
主.cpp:
MyWidget w;
app.installEventFilter(&w);
w.show();
我的小部件:
bool MyWidget::eventFilter(QObject *object, QEvent *event)
{
if ( event->type() == QEvent::MouseButtonPress ) {
QMouseEvent *orig = static_cast<QMouseEvent*>( event );
QPoint origLocation = orig->pos();
qDebug() << "Mouse Original: "<< origLocation;
int newx = abs(origLocation.x()-320);
QPoint newPoint(newx,origLocation.y());
QMouseEvent *newPosEvent = new QMouseEvent(QEvent::MouseButtonPress, newPoint, Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);
qDebug() << "Mouse New: " << newPosEvent->pos();
//qApp->postEvent(this, newPos);
return QObject::eventFilter(object, newPosEvent);
}
return QObject::eventFilter(object, event);
}
void MyWidget::mousePressEvent ( QMouseEvent * event )
{
qDebug() << "Mouse Press" << event->x() << event->y();
}